A Combination of IBA and NAA Resulted in Better Rooting and Shoot Sprouting than Single Auxin on Malay Apple [Syzygium malaccense (L.) Merr. & Perry] Stem Cuttings

Abstract

This research aimed to study effects of IBA, NAA and their combination on rooting and shoot sprouting in Malay apple cuttings. Cuttings from superior genotype were collected and treated with (in ppm w/w): 0, 2000 IBA, 4000 IBA, 2000 NAA, 4000 NAA, 1000 IBA+1000 NAA, 2000 IBA+2000 NAA. To record the timing and percentage of rooting, cuttings were treated with (in ppm w/w) 1000 IBA+1000 NAA or without auxin as control. The results revealed that application of auxin was significantly enhanced root formation as shown by the significant increases in rooting percentage and number of roots. NAA at 2000 or 4000 ppm was the most effective auxin to promote root formation (100 %, 17.8-25.5 roots per cuttings), followed by NAA+IBA (100 %, 16.8-9.8 roots per cuttings) and the least effective was IBA alone (79-100 %, 3.2-7.1 roots per cutting). The best treatment for rooting and shoot sprouting were (in ppm) 1000 IBA+1000 NAA, since it produced higher root length, better root morphology and higher shoot sprouting. It was also found that a combination of IBA+NAA each at 1000 ppm not only enhanced root percentage, but also shortened the time for root formation.

Experimental Examination of Vegetative Propagation Methods of Nothofagus antarctica (G. Forst.) Oerst. for Restoration of Fire-Damaged Forest in Torres del Paine National Park, Chile

“…From Table 1, it follows that a growth regulator most frequently used for the rooting of cuttings is IBA. Multiple studies [29,34,48,49], however, have produced results that, like ours, indicate that NAA either alone or in combination with IBA has a better influence on rooting. On the other hand, although the results of our comparisons of IBA at different concentrations showed greater success in rooting cuttings using mid-and higher-IBA concentrations, some other studies have shown lower concentrations to be more favorable [32,33,44].…”

“…There are many methods of vegetative propagation of woody plants [22,27], including by means of rooted cuttings, which is affected by multiple factors [28]. This approach has continued to develop and is used particularly in growing cultivars of fruit and ornamental woody plants [29][30][31][32][33][34]. In forestry, it is important to maintain the uniformity of genetically significant characteristics, especially in establishing plantations of fast-growing woody species [24,28,35,36].…”

Influence of various levels of growth hormones on rooting of cuttings of casuarina (Casuarina equisetifolia L.)

“…In present experiment, the influence of combined treatment of growth hormones for increasing shoot length, root length, number of primary roots and survival percentage is seen pronounced in comparison to individual hormonal treatment. The similar result was reported by Yusnita et al (2018) [19] in Syzygium malaccense (L.) Merr. & Perry stem cuttings with IBA 1000 ppm + NAA 1000 ppm, Umbreen et al (2019) [15] with IBA 1600 ppm + NAA 7000 ppm in Psidium guajava L., Hossain et al (2019) [8] in cuttings of Podocarpus neriifolius D. Don.…”

Improving Survival and Orchard Performance of “Costata” Persimmon Seedlings by K-NAA and IBA Applications

“…Dhatrika Rani et al (2018) working on guava, attributed the acceleration of photosynthesis activity to the increased leaf chlorophyll content due to increasing in leaf area by IBA treatment. Exogenous application of NAA and IBA is reported to enhance absorption activity of the roots (Yusnita et al, 2018). Accordingly, the high root biomass obtained in the present study might have helped in better water and nutrients uptake, which led to increasing leaf mineral content and leaf area, thus increasing the efficiency of the photosynthesis process, resulting in enhancing the different vegetative growth parameters studied in the presnt investigation.…”